DEV Community: charles Kamande

Fintech solution for Community Members

charles Kamande — Tue, 03 Jun 2025 16:55:04 +0000

Using CRUD, JS Python and Flask i need to make a simple application for a fintech. A product usable for the Community where members do table banking tracking transactions done by members. Anyone with ideas.

Basics to React and Rendering Components

charles Kamande — Wed, 19 Feb 2025 13:58:35 +0000

React is a JavaScript library used for building dynamic user interfaces, primarily for web applications. It enables developers to create reusable UI components and efficiently update the DOM using a virtual DOM mechanism.

Rendering Components on the DOM
To render a React component on the DOM, follow these steps:

Import React and ReactDOM: (in jsx file) import React from "react"; import ReactDOM from "react-dom";
Create a Component:
This is how you create a simple Component in jsx:

function App() {
return

Hello, React!
; }
To render the above Component to the DOM do the below:

ReactDOM.createRoot(document.getElementById("root")).render();

Note this ensures the App component is rendered inside the

in the HTML file.

References

React Documentation: https://react.dev
MDN Web Docs: https://d eveloper.mozilla.org/

Mastering JavaScript Key Concepts as a beginner

charles Kamande — Sat, 18 Jan 2025 05:36:04 +0000

Mastering JavaScript Key Concepts: The 3 Pillars of JavaScript
For beginners seeking to grasp JavaScript's core concepts quickly, focusing on its 3 Key Pillars—Prototypes, Closures, and the Event Loop—is essential. These concepts form the backbone of JavaScript's functionality and behavior.

Prototypes Prototypes enable object inheritance, allowing properties and methods to be shared among objects, minimizing redundancy. Example: javascript CopyEdit function Person(name) { this.name = name; }

Person.prototype.greet = function () {
console.log(Hello, my name is ${this.name});
};

const john = new Person("John");
john.greet(); // Output: Hello, my name is John
In this example, the greet method is attached to the Person prototype, so it is shared by all instances of Person.

Closures A closure is formed when a function "remembers" its surrounding lexical scope, even after the parent function has finished executing. Example: javascript CopyEdit function createCounter() { let count = 0; // Variable retained in closure return function () { count++; return count; }; }

const counter = createCounter();
console.log(counter()); // Output: 1
console.log(counter()); // Output: 2
Here, the inner function retains access to the count variable, demonstrating how closures work.

Event Loop The event loop ensures that JavaScript remains non-blocking by managing asynchronous operations like setTimeout or fetch. Example: javascript CopyEdit console.log("Start");

setTimeout(() => {
console.log("Async Operation");
}, 1000);

console.log("End");
// Output:
// Start
// End
// Async Operation (after 1 second)
In this example, the event loop schedules the setTimeout callback to execute after other synchronous code, ensuring smooth execution.

Why These Concepts Matter
By mastering prototypes, closures, and the event loop, you'll build a solid foundation for understanding JavaScript's object-oriented structure, functional programming features, and asynchronous behavior

DEV Community: charles Kamande

Fintech solution for Community Members

Basics to React and Rendering Components

Hello, React!

Mastering JavaScript Key Concepts as a beginner